The Mahle plain piston ring set for Napier THM-13 is supplied in a 48-piece bulk pack and sized 3.4252 in bore by 1.5 mm ring width. These plain rings are intended for engine rebuilds or manufacturing use where a large quantity of matched rings is required. The bulk packaging simplifies stocking multiple engines or assembly operations that use the Napier THM-13 specification.
Mahle Rings Performance Napier THM-13 3.4252in x 1.5MM Plain Ring Set (48 Qty Bulk Pack)